Along with that, the F version is a two touch, the A is a one touch. So for the A, you focus and zoom at the same time. For speedy zoom and focusing, this is much better. But it can cause problems with zoom creep when on a tripod and hands off. The F lens has a ring for focus and a ring for zoom.
One big issue is whether you need/want AF or not. Only the F has AF. FWIW, I have the A 70-210/4 and am very happy with it. -- Bruce Wednesday, November 22, 2006, 5:27:19 AM, you wrote: AM> The A is much larger, but is also a fixed f4 max aperture. The F is AM> smaller and lighter, but is a variabe aperture (f4-5.6) zoom. The A also AM> has the better reputation optically, but from what I've heard and seen, AM> the F is quite good. AM> -Adam AM> Owns the A, quite happy with it. AM> Walter Hamler wrote: >> Any differenced between the Pentax 70~210 F vs the A version? KEH Camera >> has several of each at very nice prices. >> >> Walt >> >> -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
